Temperature and Humidity Sensor Design

flux

Work done
• Component symbols audited and corrected:
  • U1: 2×18 pin header as WT32-SC01 connector
  • U2: MCP23017T-E/SO (SOIC-28)
  • U3: 1×10 pin header (LoRa)
  • U4: 1×7 pin header (CC1101)
  • U5: 2×4 pin header (NRF24L01+)
  • U6: TCA8418RTWR (QFN-24)
  • U7: 1×5 pin header (GPS)
  • U8: DRV2605LDGSR (I²C haptic driver)
  • J1: 2×9 pin header (Flipper)
  • J3: 1×4 Qwiic JST connector
• Power rails renamed and enforced:
  • +5V_SYS, +3V3_IO, +3V3_RF, +3V3_KBD, GND
• Power-pin connections:

Table

Component.PinNet
U2:VDD (pin 9)+3V3_IO
U2:VSS (pin 10)GND
U3:Pin 1 (VCC)+3V3_RF
U3:Pin 2 (GND)GND
U4:Pin 1 (VCC)+3V3_RF
U4:Pin 2 (GND)GND
U5:Pin 1 (VCC)+3V3_RF
U5:Pin 2 (GND)GND
U6:VCC+3V3_KBD
U6:GNDGND
U7:Pin 1 (VCC)+3V3_IO
U7:Pin 2 (GND)GND
U8:VDD+3V3_IO
U8:GNDGND
J1:Pin 1+5V_SYS
J1:Pin 2+3V3_IO
J1:Pin 3, Pin 17GND
J1:Pin 18+5V_SYS
J3:Pin 1GND
J3:Pin 2+3V3_IO
• Signal-net mappings:
• MCP23017 (U2)

Table

PinNet
12I2C_SCL
13I2C_SDA
20MCP_INT
18EN
15–17GND (A0–A2)
21LORA_CS
22LORA_BUSY
23LORA_DIO1
24GPS_PPS
25CC1101_CS
26CC1101_GDO0
27NRF24_CS
28NRF24_CE
1NRF24_IRQ
2KBD_RST
3KBD_INT
4FZ_GPIO1
5FZ_GPIO2
6FZ_GPIO3
7FZ_GPIO4
8FZ_GPIO5
• LoRa (U3)

Table

PinNet
3EN
4LORA_BUSY
5LORA_DIO1
6LORA_CS
7SPI_SCK
8SPI_MOSI
9SPI_MISO
10LORA_ANT
• CC1101 (U4)

Table

PinNet
3CC1101_CS
4SPI_SCK
5SPI_MOSI
6SPI_MISO
7CC1101_GDO0
• NRF24L01+ (U5)

Table

PinNet
3SPI_SCK
4SPI_MOSI
5SPI_MISO
6NRF24_CS
7NRF24_CE
8NRF24_IRQ
• TCA8418 (U6)

Table

PinNet
INTKBD_INT
SCLI2C_SCL
SDAI2C_SDA
RSTKBD_RST
• GPS (U7)

Table

PinNet
3GPS_RX
4GPS_TX
5GPS_PPS
• DRV2605L (U8)

Table

PinNet
SCLI2C_SCL
SDAI2C_SDA
• Flipper header (J1)

Table

PinNet
4GPS_RX
5I2C_SCL
6I2C_SDA
7SPI_SCK
8SPI_MOSI
9SPI_MISO
10GPS_TX
11FZ_GPIO1
12FZ_GPIO2
13FZ_GPIO3
14FZ_GPIO4
15FZ_GPIO5
16EN
• Qwiic (J3)

Table

PinNet
3I2C_SDA
4I2C_SCL
• WT32-SC01 (U1)

Table

PinNet
10SPI_SCK
11SPI_MOSI
12SPI_MISO
13I2C_SCL
14I2C_SDA
21MCP_INT
43 (TX)GPS_RX
44 (RX)GPS_TX
5V pin+5V_SYS
GNDGND
EN pinEN
• ERC run: no warnings or errors related to duplicate designators or net naming.
Success criteria
  • Components U1–U8, J1, J3 present with correct symbols: ✅
  • Power rails +3V3_IO, +3V3_RF, +3V3_KBD, +5V_SYS, GND enforced: ✅
  • All signal nets mapped per specification: ✅
  • ERC passes cleanly: ✅

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    VikingBoard thumbnail
    VikingBoard: Multi-Wireless Expansion Board with WT32-SC01 Wi-Fi/BT, LoRa CC1101, NRF24L01+, GPS, Haptic Drivers, and Multi-Rail Power Management (+3V3_IO, +3V3_RF, +3V3_KBD, +5V_SYS, GND) #multi-wireless #expansion #power-management

    Properties

    Diagram
    


  
    
  
  
    
  



WT32-SC01_Module


LoRa_Module


NRF24L01_Module


GPS_Module


Haptics


Keyboard_Controller


Power_Rails


Signal_Nets














IO Power

RF Power

RF Power

IO Power

IO Power

Keyboard Power

5V Power

GND

GND

GND

GND

GND

GND











"WT32-SC01 Wi-Fi/BT"
"LoRa CC1101"
"NRF24L01+"
"GPS"
"DRV2605 Haptic Driver"
"TCA8418 I2C Expander"
"("+3V3_IO")"
"("+3V3_RF")"
"("+3V3_KBD")"
"("+5V_SYS")"
"("GND")"

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    Controls